\documentclass[border=0.2cm]{standalone}
% Required package
\usepackage{tikz}
\usepackage{zenburn}

\setCJKmainfont{SourceHanSerifCN-Bold}
 
\begin{document}
\begin{tikzpicture}
  % Help grid
  % \draw[black!5,step=0.5] (-3,-3) grid (3,3);
  % \foreach \i in {-3,-2,...,3} 
  % {
  %   \node[below] at (\i,-3){\small \i};
  %   \node[left] at (-3,\i){\small \i};
  % }
  
  % Ellipse 1
  \draw[xshift=-3.5em, style={fill=zenblue,fill opacity=0.5}] (0,0) ellipse (2cm
  and 1cm);

  % Ellipse 2
  \draw[xshift=3.5em, style={fill=zenred,fill opacity=0.5}] (0,0) ellipse (2cm and
  1cm);
  
  % Set intersection label
  \node at (-1.75,0) {知识表示};
  \node at (1.75,0) {机器学习};
  \node at (0,0) {符号学习};
\end{tikzpicture}
\end{document}